Spark-plug.



H. F. WHALTON.

SPARK PLUG. APPLICATION FILED MAY 10, 1913.

Patented Nov. 10, 1914.

avwwwtoz 5 7% UNITED sTArns PATENT OFFICE.

HILARY F. WHALTON, OF KEY WEST, FLORIDA.

SPARK-PLUG.

1,116,655. Specification of Letters Patent Patented Nov. 10, 1914. Application filed May 10, 1913. Serial No. 766,869. I

TaaZZ whom it may concern: 7 through a central hole in the core, and has Be it known that I, IIILARY F. VVHALTON, a small collar on its lower part which a citizen of the United States, residing at bears against the lower end of the conical Key West, in the county of Monroe and portion 7 of the core. The lower end por- State of Florida, have invented certain new tion 16 of the rod 14 is arranged within the and useful Improvements in Spark-Plugs; gas chamber 3 of the body, and the conical and I do hereby declare the following to be form of the part 7 assists in projecting flame a full, clear and exact description of the from the said chamber. The collar leisinvention, such as will enable others skilled conical and forms a continuation of the coniin the art to which it appertains to make cal part 7, and the part 16 of therod is or and use the same. ranged on thefaxis of the gas chamber. A

This imention relates .to spark plugs for long spark gap is formed between the part,

I ignitingthe combustible charges of internal. 16 of the rod, and one end portion 18 of a ccoinbustlon engines used on motor boats and' U-shaped wire terminal 17. The parts 16 "other places where exposed to sprayv and and18are arranged parallel to each other are produced.

moisture; and it consists in the novel con- Within the gas chamber 3, and the other end struction and combination of the parts hereof the wire terminal 17-is secured to the plug inafter fully described and claimed whereby body. short-circuiting is' prevented and hot sparks The upper end portion of the rod 14 is screwthreaded, and 19is anut which en- In the drawings, Figure 1 is a vertical gages with the screwthreadcd'p ortion 20 of section through a spark plug constructed acthe rod, and draws the. collar 15 against cording to this invention. Fig. 2 is a plan the lower-end of the core. A small packing view of the same. Fig. 3 is a side view of Washer 21 13 arranged between the nut and the projections. the core to make a tight joint. One circuit The'body portion 2 of the plug is formed wire 23 is connected with the plug body, and

of metal, and it has a cylindrical gas chamthe other circuit wire 24 is connected to the 4 her 3 in its lower end portion. The core rod 14 byanut 25. The nut 19 has V-shaped 30 4 is formed of insulating material. and it has locking grooves 26. This plug is specially a collar 5 at its middle part arranged oppoadapted for use in connection with marine site a shoulder 6 at the upper end of the internal combustion engines which are exchamber 3. The core also has a conical porposed to spray and moisture, and which miss tion 7 which projects centrallywithin the fire when a short circuit is formedby a gas chamber 3, and its upper end portion layer of moisture covering or running down projects upwardly througha screwthreaded the projecting surface of the core. The argland 8 which secures the core in the plug rangement of the terminals also produces body. Packing washers 9 of suitable matehot sparks which give a satisfactory ignirial, such as indurated fiber, are interposed tion'of the contents of the cylinder by first between the plug body and the collar, and igniting the gas in the chamber 3. The lockbetween the collar-and the gland, to form ing grooi es 26 of the nut 19 engage with tight jointsthe soft packing washer 21 and lock the nut The projecting end portion of the core is and make a tight joint. provided with a series of downwardly and What I claim is:

outwardly inclined surfaces or projections In a spark plug, the combination, with a 10 arranged one above another and having plug body having a gas chamber in its horizontal surfaces 11 between them. These inner end portion, of a core of insulatinclined surfaces 10 are adapted to prevent ing material secured in the plug body spray from forming a layer on or running and provided with a conical portion which down the surface ofthe projecting portion projects partway through the said cham of the core, and thereby short-circuiting the her, a rod secured in the core and pro current. vided with a conical' collar which forms a A metallic -rod 14 extends vertically continuation of the said conical portion and having also a portion projecting fremthe sfp apex of the collar on' the axis of the gas chamber, and a terminal secured to the plug body and having one end portionarranged signatnre in the presence of two Witnesses. HILARY-F. WHALTON; Witnesses:

arallel to the projecting-portion of the said rod inside the said chamber and forming a J. N. FOGARTY,. spark gap with it. a E. W. RUSSELL.

In testimony whereof I. have aihxed my: 

